The poster ignores most of the facts surrounding this particular
situation - the Federal Government's need to
enforce a court order to turn Elian Gonzalez (the child) over to his father
after repeated attempts to negotiate the turnover were rejected by those
holding the boy; the same people who had lost every legal challenge they'd
filed in an effort to keep him. For example, there is no
acknowledgement that the situation was resolved peacefully, and that Elian
was photographed happily in his father's arms just a few hours later.
Neither is there any consideration of what might have occurred had the man
apparently attempting to protect Elian had a weapon. In fact, no one was
injured or killed. Would that have been the case had the protector
been armed? Probably not, unless he was unwilling to use his weapon; and in
that case what would be the sense in having one?

Do you believe this item was successful propaganda?

Absolutely

What evidence supports your answer to the last question?

Polls showed that information like that in this poster contributed to a
conviction among the members of the Cuban community in South Florida to
support George W. Bush over Al Gore in the presidential election that took
place a few months after the events illustrated by this image. Given
the closeness of the outcome of the presidential race in Florida, this type of propaganda
was clearly one of the factors that led to Mr. Bush's narrow Electoral
College victory, and subsequent ascension to the presidency.